- pH
- [[t]pi͟ː e͟ɪtʃ[/t]]
N-UNCOUNT: also a N, oft N of n, N numThe pH of a solution indicates how acid or alkaline the solution is. A pH of less than 7 indicates that it is an acid, and a pH of more than 7 indicates that it is an alkali.
...the pH of sea water...
Skin is naturally slightly acidic and has a pH of 5.5...
The fluid that emerges from the vents is acidic (pH 3) and hot.
English dictionary. 2008.